What is the difference between FromBody, FromQuery, and FromRoute?

Question

Accepted Answer

These attributes tell ASP.NET Core where to read parameter values from:

[FromRoute] — from URL path:

[HttpGet("{id}")]
public IActionResult Get([FromRoute] int id)
// URL: /api/products/5  → id = 5

[FromQuery] — from URL query string:

[HttpGet("search")]
public IActionResult Search([FromQuery] string name)
// URL: /api/products/search?name=laptop  → name = "laptop"

[FromBody] — from request body (JSON):

[HttpPost]
public IActionResult Add([FromBody] Product product)
// Body: { "name": "Laptop", "price": 55000 }

With [ApiController] — these are inferred automatically in most cases.

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